/*
CSE 142, Autumn 2007, Marty Stepp

This program demonstrates boolean methods with String and char.
*/

import java.util.*;   // for Scanner

public class Vowels {
    public static void main(String[] args) {
        if (isVowel('q')) {
            System.out.println("q is now a vowel i guess.");
        }
        if (isVowel('e')) {
            System.out.println("e is a vowel.");
        }
        
        String s1 = "eieio";
        if (isEntirelyVowels(s1)) {
            System.out.println("The first string is entirely vowels!");
        }
        if (isEntirelyVowels("marty stepp")) {
            System.out.println("The second string is entirely vowels!");
        }
    }
    
    // Returns whether the given character is a vowel (a, e, i, o, u).
    public static boolean isVowel(char letter) {
        return (letter == 'a' || letter == 'e' || letter == 'i' || 
                letter == 'o' || letter == 'u');
    }
    
    // Returns whether the given String contains only vowels as characters.
    public static boolean isEntirelyVowels(String s) {
        for (int i = 0; i < s.length(); i++) {
            if (!isVowel(s.charAt(i))) {
                return false;
            }
        }
        return true;
    }
}